Electric field profile of a Compact Helical System Heliotron/Torsatron plasma with tangential neutral beam injection

Journal Article · Fri Mar 01 00:00:00 EST 1991 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859594· OSTI ID:5750698

Ida, K; Yamada, H; Iguchi, H; Hidekuma, S; Sanuki, H; Yamazaki, K ^[1]

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1. National Institute for Fusion Science, Nagoya, 464-01, Japan (JP)

The radial electric field profiles derived from poloidal rotation velocity are compared with neoclassical estimates for a plateau regime plasma heated by a tangentially injected neutral beam in the Compact Helical System Heliotron/Torsatron device ({ital Plasma} {ital Physics} {ital and} {ital Controlled} {ital Nuclear} {ital Fusion} {ital Research} 1988 (IAEA, Vienna, 1989), Vol. 2, p. 411). The measured electric field ({ital E}{sub {ital r}}) is more negative than the neoclassical prediction, especially near the plasma periphery. A gradient of radial electric field ({partial derivative}{ital E}{sub {ital r}}/{partial derivative}{ital r}) in this region is found to be more negative in the plasma with higher electron density. Although the corresponding poloidal rotation velocity is too small to trigger the L/H transition, these negative {ital E}{sub {ital r}} and {partial derivative}{ital E}{sub {ital r}}/{partial derivative}{ital r} are associated with a reduction of thermal electron conductivity.

• OSTI ID: 5750698
• Journal Information: Physics of Fluids B; (USA), Vol. 3:3; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA
ELECTRIC FIELDS
CHARGE EXCHANGE
CORRELATIONS
ELECTRON DENSITY
HELICAL CONFIGURATION
HELIOTRON
NEUTRAL ATOM BEAM INJECTION
PLASMA DIAGNOSTICS
PLATEAU REGIME
PRESSURE GRADIENTS
ROTATION
SPECTROSCOPY
THERMAL CONDUCTIVITY
TOROIDAL CONFIGURATION
TORSATRON STELLARATOR
VELOCITY
ANNULAR SPACE
BEAM INJECTION
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFIGURATION
MAGNETIC FIELD CONFIGURATIONS
MOTION
PHYSICAL PROPERTIES
SPACE
STELLARATORS
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics